Which is the charge of an ion that could bond to the one pictured

Which of the following is always a reactant in a combustion reaction? oxygen nitrogen hydrogen carbon

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

What forms when chemical reactions combine pollution with sunlight?